The
906EC is based on
Coffee Lake architecture while the
3400G is based on
Zen+.
Using the multithread performance as a reference, the 906EC gets a score of
494.2 k points while the 3400G gets
200.3 k points.
Summarizing, the
906EC is
2.5 times faster than the
3400G. To get a proper comparison between both models, take a look to the data shown below.